<?php

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *	   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @package log4php
 */

/**
 * Returns the name of the logger which created the logging request.
 *
 * Takes one option, which is an integer. If the option is given, the logger
 * name will be shortened to the given length, if possible.
 *
 * @package log4php
 * @subpackage pattern
 * @version $Revision: 1326626 $
 * @since 2.3
 */
class LoggerPatternConverterLogger extends LoggerPatternConverter
{

    /**
     * Length to which to shorten the name.
     */
    private $length;

    /**
     * Holds processed logger names.
     */
    private $cache = array();

    public function activateOptions()
    {
        // Parse the option (desired output length)
        if (isset($this->option) && is_numeric($this->option) && $this->option >= 0) {
            $this->length = (integer) $this->option;
        }
    }

    public function convert(LoggerLoggingEvent $event)
    {
        $name = $event->getLoggerName();
        
        if (! isset($this->cache[$name])) {
            
            // If length is set return shortened logger name
            if (isset($this->length)) {
                $this->cache[$name] = LoggerUtils::shortenClassName($name, $this->length);
            }             

            // If no length is specified return full logger name
            else {
                $this->cache[$name] = $name;
            }
        }
        
        return $this->cache[$name];
    }
}
